Midterm1WHITEanskey

Midterm1WHITEanskey - BIS103-001 - FIRST MIDTERM April 29,...

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BIS103-001 -- FIRST MIDTERM April 29, 2008 Name _____________________________________ 1 Last, First (print clearly, please) Student ID # _______________________________________ Check a box below if it applies to you Audit Completing Incomplete Note: There are 6 questions and a total of 11 numbered pages including the cover sheet. A blank sheet is attached to the back for scratch paper and to cover your exam. Do not use this paper for your answers. If you need more room use the back of the numbered pages. Partial credit will be given. WRITE YOUR NAME ON THE TOP OF EACH PAGE. Question Value Score 1 12 2 12 3 20 4 28 5 8 6 20 TOTAL 100 T= 298º K R= 8.315 J x mol -1 x K -1 Faraday's constant (F) is 96.5kJ x volt -1 x mol -1 Δ G o ' for the reaction ADP + P i ATP + H 2 O = + 30.5 kJ x mole -1 Δ G o ' = - n F Δ E o ' Δ G = Δ G o ' + RT ln [products/reactants] I, ______________________________, authorize the University to distribute publicly this graded exam ( e.g. , handed out in class, or left in a bin for me to pick up). Signature ________________________________________ Date _____________________ Honor Code: My signature below affirms that I wrote this exam in the spirit of the honor system of UCD. I neither received nor furnished any help during the exam. Signature ________________________________________
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BIS103-001 -- FIRST MIDTERM April 29, 2008 Name _____________________________________ 2 Last, First (print clearly, please) 1. (12 pts). For the following enzymes, draw the structures of the substrate(s) and product(s) for the reaction they catalyze . Write balanced reactions. Include the names (no structures) of any co-factors, nucleotides if required for the reaction. You may use Pi for inorganic phosphate if required for the reaction. Indicate with arrowheads the physiological direction(s) of the reactions. a. malate dehydrogenase C COO - C H HO H H COO - C COO - CH 2 COO - O + H + NAD NADH b. glyceraldehyde-3-P phosphatase H HC OH CH 2 OPO 3 2- O H 2 O Pi H HC OH CH 2 OH - O c. galactose-6-P ketolisomerase H CHO OH H HO H HO OH H CH 2 OPO 3 2- CH 2 OH O H HO H HO OH H CH 2 OPO 3 2-
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BIS103-001 -- FIRST MIDTERM April 29, 2008 Name _____________________________________ 3 Last, First (print clearly, please) 2. (12 pts) Glycogen and Glycogen Metabolism (a) (4 pts.) Give two reasons why phosphorolytic cleavage of muscle glycogen is more advantageous than hydrolytic cleavage. Reason 1: produces a phosphorylated sugar that will be more easily retained in the cell Reason 2: the phoshorylation does not use ATP or any nucleotide so no ATP is lost in this step. The ATP yield in higher from glycogen. (b). A glycogen fragment is shown below. Answer the following questions about this
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Midterm1WHITEanskey - BIS103-001 - FIRST MIDTERM April 29,...

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